1. KEY CONCEPT Organisms can be classified based on physical similarities.

2. Swedish botanist Carolus Linnaeus developed the scientific naming system (1750’s) still used today.
Taxonomy is the science of naming and classifying organisms into seven groups or levels called taxon.
plural- taxa
White oak: Quercus alba

3. Each level is included in the level above it.
Levels get increasingly specific from kingdom to species.

4. Binomial nomenclature - a two-part scientific naming system.
Latin and italics
First part -the genus name, capitalized
Second part – the species descriptor, lower case, never written alone
Homo sapien (wise man)

5. A genus includes one or more physically similar species.
Tyto alba

6. Scientific names help scientists to communicate.
Some species have very similar common names.
Some species have many common names.

7. The Linnaean classification system has limitations.
Did not include Domains
Linnaeus taxonomy doesn’t account for molecular evidence, based only on physical similarities
Modern the technology did not exist- DNA and Gene sequencing, protein analysis, radiometric dating, relative dating (fossil record).

8. Physical similarities are not always the result of close relationships.
Genetic similarities more accurately show evolutionary relationships.

9. man Domain eukarya King Kingdom animalia Philip Phylum Chordata Came
Class
Mammalia
Over
Order
Primate
For
Family
Hominid
Great
Genus
Homo
spagetti
species
sapien